import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * 有父类Base，内部定义了x、y属性。有子类Sub，继承自父类Base。子类新增了一个z属性，并且定义了calculate方法，
 * 在此方法内计算了父类和子类中x、y、z属性三者的乘积。请补全子类构造方法的初始化逻辑，使得该计算逻辑能够正确执行。
 * User: 15085202591
 * Date: 2022-12-17
 * Time: 20:23
 */
class Base{
    private int x;
    private int y;

    public Base(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }
}
class Sub extends Base{
    private int c;

    public Sub(int x, int y, int c) {
        super(x, y);
        this.c = c;
    }

    public int getC() {
        return c;
    }

    public int calculate(){
        return super.getX() * super.getY() * getC();
    }
}
public class Demo2 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNextInt()){
            int x = sc.nextInt();
            int y = sc.nextInt();
            int c = sc.nextInt();
            Sub sub = new Sub(x,y,c);
            System.out.println(sub.calculate());
        }
    }

}
